Improvement in processes of preparing and ornamenting photographic plates



UNITED STATES PATENT QFFICEO HENRY G. WENZLAWSKI AND ADOLPH MT ILLER, OFSYRACUSE, NEW YORK.

IMPROVEMENT IN PROCESSES 0F PREPARING AllD ORNAMENTING PHOTOGRAPHICPLATES.

Specific tion forming part of Letters Patent No. 148,269, dated March 3,1874; application filed -l3ebruary 24, 1873.

To all whom it may concern:

Be it known that we, HENRY C.WENZLAWS-KI and ADoLPH M iiLLER, ofSyracuse, Onondaga county, New York, have invented anlmproved Process inthe Manufacture of Ornamental Plates for Photographic Printing, of whichthe following is a specification:

The purpose of our invention is to furnish ornamental borders and otherornamental work for framing photographs and other pictures, or for otherornamental objects, by means of photographic printing, the followingbeing a description of our invention and its application:

First, we take a plate of glass and thoroughly clean it, and we thendraw upon its surface, in india-ink, the design desired, all theirregularities of the outline being carefully corrected by erasure andetching. The demitints are then laid in with a compound of whitelead andgum-arabic, in which etching may be resorted to in part, if desired.After the design is completed the glass is again thoroughly cleanedaround the design and heated to a moderate degree and varnished with avarnish hereafter described, when it is ready for printing.

A modification of this process we sometimes adopt is as follows: Theglass is cleaned, as

V before and then covered with a thin coat of white-lead and gum-arabic,care being taken not to use too much gum, or it will be likely to scaleoff. After this is dry the design is drawn on the surface. Then all thesuperfluous material is removed by scraping with a wooden or otherproper implement, the fine and delicate outlines and shadin gs beingmade by an etching-needle, after which the first lights are laid in withan additional coat of white-lead mixed with gum-arabic. The plate isthen moderately heated and a coating of the varnish applied, and whenthis is dry the p high lights are put in with the same composition ofgum and white-lead or their equivalent, which, by means of the varnish,is bound more firmly, and the whole is finished with a final coat ofvarnish, and the plate is ready for printing by the ordinaryphotographic method, as in the former case.

The varnish we prefer to use in the above processes is composed of sevenand one-half ounces of gum-sandarac; forty-five ounces of alcohol ofcommerce; one and one-half ounce of camphor-gum three ounces Veniceturpentine; three-fourths ounce oil of lavender. These ingredients forma clear transparent varnish adapted to our purposes above described.

Having thus fully described our process of preparing plates forphotographic ornamental printing, what we claim is- The process hereindescribed for preparing plates for photographic printing, substantiallyas herein set forth.

HENRY C. WENZLAWSKI. ADOLPH MULLER. YVitnesses:

J. J. GREENoUen, G. S. LEONARD.

